US 12,149,638 B2
Certificate revocation check
Kazi Wali Ullah, Espoo (FI); Patrik Salmela, Espoo (FI); and Abu Shohel Ahmed, Espoo (FI)
Assigned to Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
Appl. No. 17/623,786
Filed by TELEFONAKTIEBOLAGET LM ERICSSON (PUBL), Stockholm (SE)
PCT Filed Jul. 1, 2019, PCT No. PCT/EP2019/067551
§ 371(c)(1), (2) Date Dec. 29, 2021,
PCT Pub. No. WO2021/001009, PCT Pub. Date Jan. 7, 2021.
Prior Publication US 2022/0247580 A1, Aug. 4, 2022
Int. Cl. H04L 29/06 (2006.01); H04L 9/32 (2006.01)
CPC H04L 9/3268 (2013.01) [H04L 9/321 (2013.01); H04L 9/3247 (2013.01); H04L 2209/80 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method for certificate revocation check during a subscription related procedure for a subscriber entity, the method being performed by the subscriber entity, the method comprising:
sending, by the subscriber entity, a nonce as a challenge towards a subscription management entity separately located at a different device from the subscriber entity to trigger generation of a fresh online certificate status protocol (OCSP) response that is to be transmitted by the subscription management entity to the subscriber entity;
receiving, by the subscriber entity, a message sent from the subscription management entity during remote subscriber identity module (SIM) provisioning for the subscriber entity, the message comprising a certificate and the OCSP response for the certificate, the OCSP response being bound to the nonce and indicating a revocation state of the certificate; and
determining, by the subscriber entity, whether the certificate has been revoked or not by checking the revocation state as indicated in the OCSP response.